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ASTM A790 is the standard specification for seamless and welded ferritic‑austenitic (duplex and super‑duplex) stainless steel pipes designed for demanding corrosive, high‑pressure, and industrial applications. These pipes combine a balanced duplex microstructure (ferrite + austenite) to deliver higher strength and toughness than traditional austenitic stainless steels, along with excellent resistance to chloride‑induced corrosion, pitting, crevice corrosion, and stress‑corrosion cracking.
Available in multiple UNS grades such as S31803, S32205 (Duplex 2205), S32750 (Super Duplex 2507), and S32760 (Zeron 100), ASTM A790 pipes are suitable for offshore oil & gas, chemical processing, petrochemical, desalination, marine, power generation, and water treatment systems. They can be supplied as seamless or welded pipes in a wide range of sizes and wall thicknesses to meet diverse engineering and fabrication needs.
